BB639CE7904HTSA1

Overview

The BB639CE7904HTSA1 is a silicon variable capacitance diode manufactured by Infineon Technologies, designed for UHF and VHF tuner applications. It features a single diode configuration in an SOD-323 surface-mount package with two pins. Key electrical parameters include a maximum reverse voltage of 30 V and a maximum forward current of 20 mA. The junction capacitance ranges from 2.85 pF to 29.75 pF at test conditions of 1/28 V, yielding a tuning ratio of 14.7. The series resistance is specified at 0.65 Ω. The component operates within a temperature range of -55 °C to +150 °C and complies with RoHS standards.

Feature Summary

• Single diode configuration optimized for UHF and VHF tuner circuits
• High tuning ratio capability for effective frequency selection
• Low series resistance for efficient signal handling
• RoHS compliant and lead-free construction

Applications

• UHF-TV tuners
• VHF tuners
• Frequency modulation circuits

Procurement Notes

Verify the specific ordering suffix (e.g., HTSA1 vs XT) to confirm packaging format, as the base part number may correspond to different reel or cut-tape options. Confirm end-of-life status through official manufacturer channels before finalizing design-in decisions. Ensure compatibility with existing PCB footprints for the SOD-323 package during replacement planning.

Selection Notes

Select this component when a high tuning ratio is required for UHF/VHF applications. Compare junction capacitance values against circuit requirements to ensure proper frequency coverage. Verify that the 30 V reverse voltage rating exceeds the maximum expected bias voltage in the application. Check thermal limits if operating near the upper temperature boundary.

Part Context

This part belongs to Infineon's varactor diode portfolio, specifically engineered for radio frequency tuning. It shares the BB639 family designation but differs in packaging and tape/reel specifications based on the suffix. The device is distinct from similar models like the BB439 or BB535 due to its specific capacitance range and tuning ratio characteristics.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult Infineon's official cross-reference tools for potential alternatives. Ensure any replacement matches the SOD-323 package and electrical parameters such as capacitance range and reverse voltage.